Outside-steam-pipe locomotive-cylinder.



P. SHEEDY.

)UTSIDE STEAM PIPE LOCOMOTWE CYLINDER.

' APPLICATION FILED APR. 7- l9l6.

Patented Sept. 5, 1916 a w m a 1 m k. E 1 .v v 5 .6 I W a k w ,F L All/ P f I M V M 2 m G a/lllllllllflll F. SHEEDY. OUTSIDE STEAM PIPE LOCOMOTIVE CYLINDER.

APPLICATION FILED APR. 1. I916. 1 196 814 PatentedSept. 5,1916. ZSHEETSrSH EET 2.

.mvzuron PATRICK SHEEDY, OF LOS ANGELES, CALIFORNIA, ASSIGNOR OF ONE-THIRD TO DANIEL I. KELLOGG AND ONE-THIRD T0 DAVID ADAMSON, 0F LOS ANGELES, CALIFORNIA.

OUTSIDE-STEAM-PIPE LOCOMOTIVE-CYLINDER.

Specification of Letters Patent.

Patented'Sept. 5, 1916.

Application filed. April 7, 1916. Serial No. 89,683.

and State of California, have invented acertain new and useful Improvement in Outside-Steam-Pipe Locomotive Cylinders,

of which improvement the following is a specification.

The object of my invention is to effect a material and substantial economy in that element of the modernization of existing locomotives which relates to improvement in cylinder construction, by a simple and inexpensive method of converting existing cylinders, of the type which has, until a comparatively recent date, been practically standard, in which steam is supplied, through aninside steam pipe, to a steam passage in the cylinder saddle, into cylinders which, as now most approved in practice, are adapted to be supplied with steam through outside steam pipes.

The improvement claimed is hereinafter fully set forth.

The advantages of effecting steam supply to locomotive cylinders through what are known as outside steam pipes, particularly in facilitating draft by relieving the lower portion of the smoke box of the boiler from obstruction; eliminating steam leaks through bottom steam pipe joints in the smoke box; and promoting the application of superheaters, are now so well and thoroughly recognized, that in practically all new locomotives, cylinders provided with outside steam pipes are applied. The approval of this construction goes so far that inmany instances, when it has been found advisable to modernize existing locomotives by the application of recent improvements in structural detail, the inside steam pipe cylinders and saddles have been scrapped and entirely newones, fitted with outside steam pipes, substituted, such changes involving a very considerable cost, as, say,

over one thousand dollars per. pair of cylinders, in locomotives of the average size.

My invention enables outside steam pipe cylinders of the present approved design, to be produced by the conversion thereinto of existing cylinders of the inside steam pipe type, which may be effected at a cost which is only a small fraction of that above indicated, and without involving any sub? 'isa stant-ial period of withdrawal of the locomotive from service.

In the accompanying drawings: Figure 1 vertical transverse central section through a locomotive cylinder, valve chest, and saddle of the inside steam pipe type, to which my invention is to be applied; F 1g. 2, a similar section of the same, after its conversion into an outside steam pipe cylinder by my invention; Fig. 3, an axial section through the cylinder and valve chest shown in Fig. 2; and, Fig. 4, a side vieav,

in elevation, of the same.

My invention is herein exemplified as applied to a locomotive cylinder and 'valve chest which, as shown in Fig. l, are of one of the standard types heretofore and at present operating in railroad service with an inside steam pipe. The cylinder, 1, is

cast integral with a superposed distribution valve chest, 2, and, in the instance shown, is also integral with a half saddle member, 8, through which the cylinder is supported on the locomotive frame, 4, and which, in turn, supports the smoke box, 5, of the boiler. ,It will be obvious to those familiar with locomotive construction, that all the essentials of the construction shown would be presented if the integral cylinder and valve chest were connected to an independent bed plate which performs the function of the half saddle, as was formerly general practice, and is yet preferred by the me- .chanical departments of some of the railroads of the United States.

The valve chest, 2, which is adapted for the operation of an inside admission distribution valve of the piston type, is fitted passage, 3 in the half saddle, the top of 'which is adapted for connection to an exhaust pipe in the smoke box. Steam is supplied to the valve chest through a steam passage, 3?, formed in the half saddle and valve chest and opening into the latter between the open inner ends of the valve bushings, 6, 6, and is admitted to, and exhausted from,

opposite ends of the cylinder, through the ports of said bushings, by the reciprocation of a piston distribution valve, in the ordi-' nary manner.

- the valve bushings, 6, 6. The bushing, 7 is open, at bottom, on its opposite sides, to the valve bushings, and is open at its top, which is adapted for connection to the lower end of an outside steam pipe, 8, a ball joint ring, 8*, being interposed between it and the steam pipe, 8. The bushing is connected to the valve chest by bolts, 7 passing through a circumferential flange, 7*, on the bushing, the under side of which bushing is curved in conformity with the adjoining outer surface of the valve chest. The bushing is then boredout in line axially with the valve bushings, 6, 6-, and said bushings are pressed, steam tight, into its. opposite side openings, in which they are permanently located, as shown in Fig. 3.

As shown in Fig. 2, the original steam supply passage, 3*, may, if desired, be filled with a suitable composition, as a mixture of cement and iron borings. Such a filling is of advantage in assisting to support the bushing, 7 and preventing deterioration due to the entry of moisture into the unused passage.

By the above method of reconstruction, which can be carried out at'comparatively slight expense and with but little delay to the operation of the locomotive, it will .be seenthat an outside steam pipe may be applied to a locomotive cylinder which was originally designed for inside steam pipe supply, with the same facility as if'the latter had been, as constructed, adapted for such application, and in the improvement or modernization of the locomotive, in this particular, the very substantial economy of avoiding the abandonment and scrapping of a valuable pair-of cylinders, is effected. A special feature of advantage in the form and manner of connection of the finger ring bushing, is presented the slight cost of making and applying it, and in the minimization ofliability to steam leakage, as it is not necessary that the joint between its flange and the valve chest should be steam cally with said single'piece bushing and pressed steam tight thereinto.

'2. As a new article of manufacture, a locomotive cylinder having a valve chest cast integral therewith; a single piece bushing extending into the valve chest portion of the casting through a transverse central opening therein and having an external steam pipe opening and a circumferential flange secured to the valve chest portion;

and valve bushings fixed in said valve chest portion concentrically with said single piece bushing and pressed steam tight thereinto. 3. .As a new article of manufacture, an integral bushing for insertion in a valve chest which is cast integral with a locomotive cylinder, said bushing being open and adapted for connection to a steam pipe at one end, and having lateral openings for the insertion of valve bushings adjacent to its opposite end, anda circumferential flange located between said openings and its steam pipe connection end. PATRICK SHEEDY.

Witnesses:

I. V. BAOHELDER, J. G. MOMULLEN.

topics of this patent may be obtained for five cents each, by addressing the Commissioner or Patents,

Washington, D. G. 

